CPU/Mobo Getting no display, advice needed !

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goodakash

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Hello all !
The problem I am facing is that when I power on the pc, I am not getting any disply, not even the BIOS screen. The pc would power on, CPU/gfx card fan would spin, everything powers on, but I still don't get a display. And no beeps.

Things I tried :
1. Connected my pc to my lcd tv via hdmi cable to rule out if the monitor is faulty. Still the same issue.
2. Removed the gfx card, cleaned it properly, replaced the paste, placed it back. Same issue.
3. Removed the gfx card completely, and connected my monitor via the vga port of my motherboard. Still the same issue.
4. Replaced the motherboard, RAM, but still got no display.

Now I am thinking if the problem is with my PSU. I plugged out the power connector from the motherboard to see any burn signs but I did not see any.
If it helps, I got this problem after I purchased a cheapo UPS worth Rs. 1500. Don't know if its related.

My specs :
Pentium DC E5200@3.5ghz
Gigabyte g41m combo
8gb ddr3
Ati msi 4850 1gb
Zebronics 600w PSU
 
goodakash said:
If it helps, I got this problem after I purchased a cheapo UPS worth Rs. 1500. Don't know if its related.
Click to expand...

That power supply could be the culprit. Zebronics used to make sub-standard power supplies back in the day and I bet things haven't changed today. What power supply were you using before?

It always makes sense to invest in a decent power supply. When a lowly PSU goes bust, there are chances it might take away the motherboard and other components along. Do not risk it.

4. Replaced the motherboard, RAM, but still got no display.
Click to expand...

As in, replaced with another set of motherboard and RAM modules? If yes, this rules out the motherboard and RAM.
 
Yes. I had spare motherboard and RAM modules, so I know they are not faulty.
Even I am guessing that the PSU may be faulty. But I don't have a spare PSU to test. What to do ? Should I buy a new one ?

Edit: I am using this zebronics psu from the start....more than 4 years i think
 
goodakash said:
Yes. I had spare motherboard and RAM modules, so I know they are not faulty.
Even I am guessing that the PSU may be faulty. But I don't have a spare PSU to test. What to do ? Should I buy a new one ?

Edit: I am using this zebronics psu from the start....more than 4 years i think
Click to expand...

Can't be certain of it but it is likely that the PSU is the culprit here. Do you have friends around with a decent power supply so you can test your system? You just need to take your board, CPU and RAM. They may have to unplug the primary cables off their system (a pain, truth to be told but most of them would be willing to; doesn't hurt asking).
 
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Go to a computer service center and get your power supply checked. Also check if the graphics card is working properly, and check if the cable connecting graphics card and monitor is fitted properly and tightly
 
Yes I will be going to nehru place tomorrow to get it checked. Do you people know of any well known repair shops there ??
Also just in case if i would require to buy a new psu which one would you suggest, keeping in mind my gfx card which require 30amps at 12v rail. The cheaper the better.

Thanks everyone for their responses :)
 
Regardless of the diagnosis, change the PSU. Only the Seasonic S12II is good at the entry level. A 430W should be enough.

P.s.: The GPU doesn't need 30A on the 12V rail. Its power draw is ~110W / 10A on the 12V rail. The 30A spec is probably a recommended value from AMD for the entire system load.
 
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Hello all !
Thanks for your responses and suggestions. I took my system to a service center and it turned out to be PSU issue. Got it changed and bought a Cooler Master 500W PSU. Now system is running perfect.

Thanks again for your responses.

Crazy_Eddy said:
P.s.: The GPU doesn't need 30A on the 12V rail. Its power draw is ~110W / 10A on the 12V rail. The 30A spec is probably a recommended value from AMD for the entire system load.
Click to expand...

Hey thanks for that info. It kept me worried all the time !
 
OMG! :banghead:

Not that power supply! I wonder why people even consider Coolermaster power supplies in the first place. These are folks who make good enclosures - nothing more.

If you can, please replace it with a Corsair or Seasonic unit.
 
IMO, Coolermaster has replaced their OEM since the Extreme Power days. Not read much about their Thunder series but it doesn't mean its a bad PSU.

Specs match that of the Corsair CX500 down to everything so it should be OK.
 
^ OEMs are only part of the story. They're using Enhance, who made the pretty good Silent Pro/RealPower Pro units and also make the new GX series.
The GX450 is more expensive, but they still had to cut costs and use Teapo capacitors on the secondary. A Thunder 500W costs ~3k. Its obvious they've had to cut corners even more.

Its quite easy to build a decent PSU these days that can deliver, performance wise. When was the last time we've seen a PSU fail a review? Reviews however cannot test lifespan and reliability. But there are certain components that are known to fail faster under hot conditions, and it makes sense to avoid models using them.
Let me put it in IEM terms :p. If a company made an excellent IEM, and then released a cheaper variant that was identical but cut costs by using a cable which will eventually fray and snap - which one would you recommend? (Assuming the end-user is not savvy enough to replace the cable with a better quality one himself)

The CX500 may match the Thunder 500 specs, but they're different OEMs. However both are targeting the same ultra-low-budget market. Also, as of now, I would not use anything below the HX series as a reference point from Corsair.
 
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^^ Ha ha, don't worry I understood the first part. :P

But Thunder series and Corsair VX series aren't the ultra low end budget PSUs ! They sell far below what Zebronics, Iball and other Chinese OEMs sell in the market at far lesser prices. I wonder what the sales of the mid and higher end models of Corsair and Coolermaster sell for in India.

In any case since no one really knows whether the Thunder series is really as bad/good as the Corsair CX series it seems a bit premature to ask the OP to return the PSU and possibly incur some loss while getting another PSU which may or may not be any better. Now if the suggestion was to get a Corsair HX series PSU or a Seasonic PSU then that would be a different issue.
 
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Yeah I'm not expecting him to return it, whats done is done :). But I had already suggested he pick up the Seasonic S12II. Just putting a cautionary note for other people who come across the same issue in the future.

Zebs, Iballs are a different league. The Thunder is low-end in the Coolermaster lineup. The GX is one step above it, but with the capacitor choices they've made, it isn't good enough IMHO. Considering the Thunder is cheaper and built by the same OEM, it will be the same story.
 
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Guys ! The thing was I took my PC to the shop from where I purchased all its components, and he was ready to troubleshoot it only if I purchased the faulty part from him, I agreed because he was a reliable guy to me. When we came to know about the PSU issue, I asked him about Corsair, Seasonic PSU, but he had none except Cooler Master PSUs. Had I known that CM is a bad PSU maker, I would have never bought this, but then, my Zebronics PSU also served me well for 4 years ! CM should be making better PSU than Zebs IMO !

PS : Thanks for all the information guys. It will help me buy better components when I build my new PC.
 
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